Therefore, the existence and uniqueness of the RHP11 can shown by using a small-norm RH problem , [1]}, [2]}, and we have
\(E(z)=I+\frac{1}{2\pi i}\int _{\Sigma ^{(E)}}\dfrac{\left( I+\rho (s)\right) (V^{(E)}-I)}{s-z}ds,\) 
